nestable C/C++ parser

[Paul Miller]

> I think your original request got lost in a side track.  If is very possible
> to do what you want with expat.  The trick is the use of the XML_SetUserData
> and the userdata argument.  Basically, the trick is to create a base class
> that has methods that you want to change the behavior of (typically,
> StartElement and EndElement).  Create derived classes for each different
> behavior that you want.  Call XML_SetUserData to the initial handler object.
> In your StartElement callback, cast the userdata argument up to a pointer to
> your base class and call its startElement virtual method.  If you want to
> change the handler, make another call to XML_SetUserData.

The problem here is it requires 3 callbacks to parse a single element
and restore the state. I'd like a cleaner solution.

--
Paul Miller - stele at fxtech.com

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